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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 224 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.28² =
  2. 2.26² =
  3. 3.18² =
  4. 4.14² =
  5. 5.22² =
  6. 6.15² =
  7. 7.21² =
  8. 8.27² =
  9. 9.13² =
  10. 10.19² =
  11. 11.16² =
  12. 12.25² =
  13. 13.11² =
  14. 14.23² =
  15. 15.24² =
  16. 16.12² =
  17. 17.29² =
  18. 18.17² =
  19. 19.15² =
  20. 20.12² =
  21. 21.14² =
  22. 22.25² =
  23. 23.19² =
  24. 24.13² =
  25. 25.17² =
  26. 26.28² =
  27. 27.27² =
  28. 28.11² =
  29. 29.16² =
  30. 30.22² =
  31. 31.17² =
  32. 32.11² =
  33. 33.11² =
  34. 34.19² =
  35. 35.17² =
  36. 36.16² =
  37. 37.27² =
  38. 38.25² =
  39. 39.18² =
  40. 40.26² =

Answer key

  1. 784
  2. 676
  3. 324
  4. 196
  5. 484
  6. 225
  7. 441
  8. 729
  9. 169
  10. 361
  11. 256
  12. 625
  13. 121
  14. 529
  15. 576
  16. 144
  17. 841
  18. 289
  19. 225
  20. 144
  21. 196
  22. 625
  23. 361
  24. 169
  25. 289
  26. 784
  27. 729
  28. 121
  29. 256
  30. 484
  31. 289
  32. 121
  33. 121
  34. 361
  35. 289
  36. 256
  37. 729
  38. 625
  39. 324
  40. 676

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